ANGELA Merkel's ally Manfred Weber pleaded for the European Union's help to "deliver" on a reformed migration policy as Germany's coalition government is set to lose its majority at the Bavaria election on Sunday.

The regional elections could weaken the national government if the CSU is not successful and blame is placed on Horst Seehofer, who is Ms Merkel’s Interior Minister and leader of the CSU.

The CSU, which is Ms Merkel’s coalition partner and Bavarian sister party to the CDU, will be contesting the vote on October 14 against the Alternative for Germany (AfD) anti-immigration party.

The AfD has surged in popularity with anti-Islamic rhetoric and attacks on Chancellor Angela Merkel's migrant policy - a hot topic in Bavaria, where most of the 1.5 million asylum seekers who reached Germany in the past three years entered the country.

The party’s rise has decimated support for Mrs Merkel's Bavarian allies the Christian Social Union (CSU) which is set to lose the absolute majority with which it has controlled the southern state for most of the post-war period.

The loss of the CSU’s absolute majority in Bavaria would put yet more pressure on Mrs Merkel’s crisis-torn coalition Government and could potentially lead to its downfall.

A poll published by German broadcaster ARD last week showed support for the CSU had fallen to 33 percent, despite usually getting around 50 percent of the vote.

The poll showed the Greens Party in second place, with 18 percent voter support.

This was ahead of the Social Democrats, who were at 11 percent, with the far-right AfD slightly behind with 10 percent.

As a result, this could be the CSU’s worst performance since 1950, when it received 27.4 percent of the vote.